.icon-home{
    background:url('icons/home.png') no-repeat center center;
}
.icon-permission{
    background:url('icons/permission.png') no-repeat center center;
}
.icon-student{
    background:url('icons/student.png') no-repeat center center;
}
.icon-course{
    background:url('icons/course.png') no-repeat center center;
}
.icon-item{
    background:url('icons/item.png') no-repeat center center;
}

.icon-userManage{
    background:url('icons/userManage.png') no-repeat center center;
}

.icon-roleManage{
    background:url('icons/roleManage.png') no-repeat center center;
}

.icon-menuManage{
    background:url('icons/menuManage.png') no-repeat center center;
}
.icon-modifyPassword{
    background:url('icons/modifyPassword.png') no-repeat center center;
}
.icon-exit{
    background:url('icons/exit.png') no-repeat center center;
}
